A fisherman or fisher is someone who captures fish and other animals from a body of water, or gathers shellfish.45-3011 Fishers and Related Fishing Workers US Department of Labor Worldwide, there ar
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930c27fa39fb692445304f3b24a2d2f6913877503fa930acae38f69102ecb598. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7bbb9247-6529-4720-9a45-c038fba9731c.json and https://artists.proofprofile.net/proofs/artist/7bbb9247-6529-4720-9a45-c038fba9731c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcade4001b8e1cee21adb6561903618b52038a6f599277e1886cb8de1e446b55f. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA531701058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b6fdefbfe83c29e1cdf328ee62fe4f4feab5f0ea914d4f1373f5406fcd9186. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA531701059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfac66770ea6bcd35ae89afbfe7d057ed3c30d5ef9d485ca60f45f8dbe1be9a. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA531701063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0ce65ff5e9b2b728350e42672c1639cbe6a49aa39886f4c30f0dc4eff3e344. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRNAR1711020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef90a1162888b44cf9f23fb8964db035bf1125a936951d1c4cc917e00e3784b9. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM1910477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115c1186dd76af26351e2edee28c629fc3f693b39541ba39cd9644dfdf6f60ab. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM2028020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b0f806e75e1d7a0a6854726e363416b8595c084be930f47e40cd9409776f2f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM2028024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd75f4ab76f3925e5f4c3a782511d1269aa4330db38eb763cddd40f92453314e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM2028038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4bde9b5bad509dd737851353b635b074582053775c544bd645867665f7552b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM2028026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0561f9548d0ef2424e18c532fa05da91eda3e4b15cc9fdee2fd10086ce1dece. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM2028029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca6df7ffe9e34aa5d1559d149f852257a9ab461191b17edc24600cb25b16ec2. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM2028031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5633a6519ecd81a40198abf463be8fad6d71603f0c5edb4bad5003f0a8677db5. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM2028032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06efc4ba34af79dab2c5e4dce38652ab4093b6a91599ff20a4b01f05b777452f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZZA0P2403071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0382adfa929c046a461e698fafbed0f02248c07702c6ea209f4011e6bf0cb947. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZZA0P2403074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf919d4aecc2e400d43255841587302ecaa9fcd1497665a67a0f7f06eb3846bb2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZZA0P2404086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafd81e9c26aa04148c9bb64342b90ed51c933367759f6464998cadefb586c91. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZZA0P2404087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b22020d5981da3436a92cf7a58cf904ad486f4d13273ba7b5c2562473954f7. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZZA0P2404081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc11053fc00c95fcd7486a6074f2d597079cc9968aef870182b41bcb513ba77. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZZA0P2404088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a844f271778038641cf354a1f031e40b4d2185d27a83a525370ea1fc8edf7d. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZZA0P2404089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6b39636bcdce6fe0f865a98e6ee7c71f40cc4951d601d71e9113b9be2959b6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRB471900312.